omap5evm: Board: replaced omap5evm_board_revision()

Replaced crc calculation of revision board string
to the standard processing function.

The board revision is a string which describe schematic revision.
This string stored in EEPROM.
omapboot converts it to decimal number and adds this number
to boot kernel cmdline. From board revision excludes the first three bytes.

E.g.:
board revision string:750-2600-001
board revision number:2600001

Based on u-boot commits:
omap4_dev: a85adf7acf [Salomon Chavez <schavezv@ti.com>]
omap4_dev: c4eaa4680f [Dan Murphy <dmurphy@ti.com>]

Change-Id: I9739a3254cdccbf371ef3c8b04bcda8c17f30f4f
Signed-off-by: Alexander Savchenko <oleksandr.savchenko@ti.com>
omap5uevm: Adds swap partition

Adds partition 'swap' with size 2Gb to mmc partition table.

Change-Id: I3970407e8949dc532d701c9ba1560d9e44eb0a3b
Signed-off-by: Alexander Savchenko <oleksandr.savchenko@ti.com>
blaze_tablet: add swap partition

This patch adds partition 'swap' to MMC partition table.

Change-Id: I7616b093432b692762e4a7b3f7ea8d799b569b8f
Signed-off-by: Alexander Savchenko <oleksandr.savchenko@ti.com>